Cheap Solar Cell Panel Small Solar Panel

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China main port
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TT or LC
Min Order Qty:
50000 pc
Supply Capability:
15000 pc/month

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Product Description:

 

 

Specifications

1. monocrystalline silicon solar panel

2. high efficiency

3. 25 year module output warranty

Warranty:

1) 5 years for material & workmanship;

2) 12 years for 90% power output;

3) 25 years for 80% power output.

 

Packaging & Delivery

MOQ: 50pcs

Delivery Time: 10-20 days after order confirmation

Package: Wooden carton or pallet packing

ModelNBJ-025M
Max Power (W)25w
Optimum Power Voltage18.40V
Optimum Operating Current1.36A
Open Circuit Voltage22.53V
Short Circuit Current1.45A
Size645*290*25mm
Weight3.0KG
Cell quantity36 pcs

 

 

Solar cells and their teachnoleadges

The history of solar cell development is briefly outlined, and the properties of the sun and solar radiation are reviewed. Properties of semiconductor materials that are important in the design and operation of solar cells are reviewed. The physical mechanisms involved in the generation and recombination of excess carriers are discussed and the basic equations of device physics are given. Both the dark and illuminated properties of p-n junctions are analyzed. Energy conversion efficiency limits are discussed for the photovoltaic process as well as the effects of various nonidealities on efficiency. Techniques for measuring the efficiency of photovoltaic devices are also described. The standard technology for making silicon solar cells is reviewed, and improved silicon cell technology is discussed. Considerations relevant to the detailed design of silicon cells are discussed. Several alternative device concepts are outlined and the structure and properties of solar cells made on some of the more developed alternatives to single-crystal silicon are discussed. Concentrating systems and photovoltaic systems components and applications are described. The design of stand-alone, residential, and centralized photovoltaic power systems are discussed. 

Solar cells and their applications

Multiple solar cells in an integrated group, all oriented in one plane, constitute a solar photovoltaic panel or solar photovoltaic module. Photovoltaic modules often have a sheet of glass on the sun-facing side, allowing light to pass while protecting the semiconductor wafers. Solar cells are usually connected in series and parallel circuits or series in modules, creating an additive voltage. Connecting cells in parallel yields a higher current; however, problems such as shadow effects can shut down the weaker (less illuminated) parallel string (a number of series connected cells) causing substantial power loss and possible damage because of the reverse bias applied to the shadowed cells by their illuminated partners. Strings of series cells are usually handled independently and not connected in parallel, though as of 2014)individual power boxes are often supplied for each module, and are connected in parallel. Although modules can be interconnected to create an array with the desired peak DC voltage and loading current capacity, using independent MPPTs (maximum power point trackers) is preferable. Otherwise, shunt diodes can reduce shadowing power loss in arrays with series/parallel connected cells.

 

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Q:The difference between a fuel cell and a solar cell
At present fuel cell system fuel - power conversion efficiency of 45% to 60%, while the thermal power and nuclear power efficiency of about 30% to 40%. (2) Hazardous gases SOx, NOx and noise emissions are low CO2 emissions are greatly reduced due to high energy conversion efficiency, no mechanical vibration.
Q:Is it complicated to make a solar cell work well?
For the professionals, it is not complicated at all.
Q:I studied very hard at school, but I just can not figure out how solar cells work, anybody can help me with that?
I had the same experience before when I was learning how solar cells work.
Q:What is Solar Cell Technology?
The clean energy.
Q:How is the solar panel and the battery connected?
Solar cells and battery connection, it is best to use a photovoltaic charging controller, which can control the output voltage of solar cells can protect the battery is not overcharge, but also at night when the solar cell does not generate electricity, to prevent the battery power back
Q:I bought a new poly solar cells, and the test result of the conversion efficiency is 16.8%, is it lower than usual?
If the solar cells have been used for over 5 years or more, the conversion efficiency may become lower.
Q:Silicon solar cell power generation principle
When the junction of two different materials formed by the light irradiation, the process of generating electromotive force.The process of the first material absorbs the energy of the photon, resulting in equal number of positive and negative charge, then these charges were migrated to both sides of the knot, The formation of even electricity layer. Although the effect is not generated instantaneous, but the response time is quite short.
Q:Where and how can we find the best solar cells suppliers?
To answer your first question, where to find the solar cell supplier, my answer is on the internet, where you can find any information you want to know.
Q:Can the 156x156mm high efficiency single crystal cells assembly function better compared to the traditional one?
Our company is planning to upgrade our supply system into the 156x156mm high efficiency single crystal celsl assembly, but we are still not sure if it is really that great.
Q:How to get high voltage and high current output of solar cells?
Well, there is a scientific way which can help you to get the high current solar cells, but it can only be used in the experiment.
Our company is a High-tech enterprise, who is professional on manufacturing on solar photovoltaic products. We mainly produce the solar module and system. Our annual production capacity of solar module is 50MW.Meanwhile,we also undertake the design, installation and serviceonbothon-grid & off-grid system for home and power plant.

1. Manufacturer Overview

Location Zhejiang,China (Mainland)
Year Established 2006
Annual Output Value Above US$100 Million
Main Markets North America 2.90%
South America 25.60%
Eastern Europe 4.83%
Southeast Asia 9.18%
Africa 1.16%
Mid East 2.90%
Western Europe 19.81%
Central America 2.41%
Northern Europe 9.95%
Southern Europe 8.21%
South Asia 0.97%
Domestic Market 12.08%
Company Certifications ISO 9001:2008

2. Manufacturer Certificates

a) Certification Name  
Range  
Reference  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port Rotterdam,Hamburg
Export Percentage 81% - 90%
No.of Employees in Trade Department 6-10 People
Language Spoken: English, Chinese, Japanese, German, French
b)Factory Information  
Factory Size: 3,000-5,000 square meters
No. of Production Lines 5
Contract Manufacturing OEM Service Offered Design Service Offered Buyer Label Offered
Product Price Range Low and/or Average